Bun's Lab – Telegram
Bun's Lab
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Electronics projects, vintæg computing, programming and repairs. A minimalist blog of sorts.
@BunsGarden @BunsNook
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No wonder this thing messes with photo sensors
The plugins have illuminated buttons. Except they stay dark in my frame. Tek didn't supply the +5V for the button illumnation in my particular model.

I quickly whipped up a regulator, stole some juice from the 9V supply rail and put it snugly in place.
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That's in fact an option Tektronix provided an installation manual for.
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One fancy plugin I have is this 7S12 TDR / Sampler. A plugin that itself has plugins, naughty.
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Chonkey two bay unit that provides both a vertical and a horizontal plugin.
Time Domain Reflectometry is used to detect and locate faults in cabling by sending a sharp pulse down the cable and measuring the reflections.

In the TDR configuration the right bay takes a pulse generator, such as the S-52, that achieves rise times of < 25 ps, while the left takes a sampling head. Sadly, I don't seem to have a pulse generator plugin.
What I do have however is the S-53 Trigger Recognizer and the S-2 Sampling Head, which provides me with a sampling setup with a 75 ps rise time. That equals to about 4.66 Ghz bandwidth.

That weird connector on the sampling head is a GR 874. It may look bend, but it's not. In the world of GR 874 there is no male or female, everything can mate with everything else. I might have cables. But luckily I have plenty BNC adapters
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It's so satisfying to dial right into the kink (of the cable).
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20 ps time base 👀

(okay that's a bit meaningless if I "only" have 4.66 Ghz Bandwidth)

The plugin overshoots a bit on the time axis and there is this weird glow. Needs a bit of work, but otherwise everything works fine so far. Let's not yet talk about calibrating it, please

It's really hard to take good pictures of this CRT
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